we have two cores ERS 5632FD where IST is configured , and MLT is configured in both sides of core and edges ERS4826 and ERS4850.Core1 is running as main , when we switch off the Core2 to test the rudendency , users running normally behind the edges are not able to get the internet connection via a firwall conneced to one of the edge switch ERS4850.Is this behavior normal ? It should be in my opinion , the users should get the internet despite the core 2 is Off , ultimately when the core2 is back to on , the users are getting the connection to internet .I have managed the configuration as per the Avaya documentation .

You have VRRP setup on both cores and you've verified that your IP routing is working properly correct?

Cheers!

Logged

We've been helping network engineers, system administrators and technology professionals since June 2009.If you've found this site useful or helpful, please help me spread the word. Link to us in your blog or homepage - Thanks!

Comparing the configs of the two core switches I see a lot of major differences (rip, slpp).First thing is to check and align the configs.For redundancy purposes they should be almost mirrored, except the specific parameters.